diff --git Makefile-bk Makefile
index fe98842..3ee6250 100644
--- Makefile-bk
+++ Makefile
@@ -465,7 +465,7 @@ clean:
 
 	cd $(BUILD_WEBAPP_DIR) && $(MAKE) clean
 
-	find . -type d -name data | xargs rm -r
+	find . -type d -name data | xargs rm -rf
 	rm -rf logs
 
 	rm -f mattermost.log